Sun
Mon
Tue
Wed
Thu
Fri
Sat
25
26
27
28
29
low
30
31
Feb 1
low
2
3
low
4
5
6
low
7
med
8
med
9
low
10
11
12
13
14
15
16
low
17
med
18
low
19
low
20
low
21
low
Chance of rainfall within district |
nil < 25% |
low 25% to 50% |
med 50% to 75% |
high ≥ 75% |
Issue Notes
The hemispheric long wave pattern has remained stable in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, Western Australia, New Zealand, the south Pacific, the southeast Pacific, and South America.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 3 February to 7 February, 7 February to 11 February, and 18 February to 22 February. Rain events originating in the tropics and moving south are possible about 29 January to 2 February, 11 February to 15 February, and 26 February to 2 March.
Over Western Australia the strongest cold fronts should occur about 3 February to 7 February, 8 February to 12 February, and 18 February to 22 February.
Issued Jan 24
This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models,
which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models
are designed to simulate features of the real atmosphere, including the daily movement of long
and short wave patterns in the Southern Hemisphere.
The future probability of rain in each district is estimated using output from the multi-model
ensemble, combined with historical information about the difference between the model forecasts
and observed rainfall.
In this deterministic framework the skill of the forecast tends to decrease with time, however
the forecasts are updated daily to provide the latest estimates of rainfall probability out to
28 days.